package com.atguigu.process.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.atguigu.auth.service.SysUserService;
import com.atguigu.model.process.Process;
import com.atguigu.model.process.ProcessRecord;
import com.atguigu.model.process.ProcessTemplate;
import com.atguigu.model.system.SysUser;
import com.atguigu.process.mapper.ProcessMapper;
import com.atguigu.process.service.ProcessRecordService;
import com.atguigu.process.service.ProcessService;
import com.atguigu.process.service.ProcessTemplateService;
import com.atguigu.security.custom.LoginUserInfoHelper;
import com.atguigu.vo.process.ApprovalVo;
import com.atguigu.vo.process.ProcessFormVo;
import com.atguigu.vo.process.ProcessQueryVo;
import com.atguigu.vo.process.ProcessVo;
import com.atguigu.wechat.service.MessageService;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;

import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.activiti.bpmn.model.*;
import org.activiti.engine.HistoryService;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.history.HistoricTaskInstance;
import org.activiti.engine.history.HistoricTaskInstanceQuery;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.activiti.engine.task.TaskQuery;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;

import javax.annotation.Resource;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipInputStream;

/**
 * ClassName ProcessServiceImpl
 * Package: com.atguigu.process.service.impl
 * ProjectName guigu-oa-parent
 * Description:
 *
 * @Author: 比特张
 * @Create: 2023/6/28 - 13:33
 * @Version: v1.0
 */
@Slf4j
@Service
public class ProcessServiceImpl extends ServiceImpl<ProcessMapper, Process> implements ProcessService {
    @Resource
    private RepositoryService repositoryService;
    @Resource
    private SysUserService sysUserService;
    @Resource
    private ProcessTemplateService processTemplateService;
    @Resource
    private RuntimeService runtimeService;
    @Resource
    private TaskService taskService;
    @Resource
    private ProcessRecordService processRecordService;
    @Resource
    private HistoryService historyService;
    @Resource
    private MessageService messageService;

    @Override
    public IPage<ProcessVo> selectPage(Page<ProcessVo> pageParam, ProcessQueryVo processQueryVo) {
        IPage<ProcessVo> pageModel = baseMapper.selectPage(pageParam, processQueryVo);
        return pageModel;
    }

    @Override
    public void deployByZip(String deployPath) {
        InputStream inputStream =
                this.getClass().getClassLoader()
                        .getResourceAsStream(deployPath);
        ZipInputStream zipInputStream = new ZipInputStream(inputStream);
        // 部署
        Deployment deployment = repositoryService.createDeployment()
                .addZipInputStream(zipInputStream).name("请假申请流程").deploy();
        log.info("部署流程Id = {}", deployment.getId());
        log.info("部署流程名称 = {}", deployment.getName());
    }

    @Override
    public void startUp(ProcessFormVo processFormVo) {
        // 1 根据当前用户id获取用户信息
        SysUser sysUser = sysUserService.getById(LoginUserInfoHelper.getUserId());
        // 2 根据审批模板id把模板信息查询
        ProcessTemplate processTemplate = processTemplateService.getById(processFormVo.getProcessTemplateId());
        // 3 保存提交审批信息到业务表，oa_process
        Process process = new Process();
        // processFormVo复制到process对象里面
        BeanUtils.copyProperties(processFormVo, process);
        // 其他值
        process.setStatus(1); // 审批中
        String workNo = System.currentTimeMillis() + "";
        process.setProcessCode(workNo);
        process.setUserId(LoginUserInfoHelper.getUserId());
        process.setFormValues(processFormVo.getFormValues());
        process.setTitle(sysUser.getName() + "发起" + processTemplate.getName() + "申请");
        baseMapper.insert(process);
        // 4 启动流程实例 RuntimeService
        // 4.1、流程定义key
        String processDefinitionKey = processTemplate.getProcessDefinitionKey();
        // 4.2、业务key processId
        String businessKey = String.valueOf(process.getId());
        // 4.3、流程参数 form表单json数据，转换map集合
        String formValues = processFormVo.getFormValues();
        // formData
        JSONObject jsonObject = JSON.parseObject(formValues);
        JSONObject formData = jsonObject.getJSONObject("formData");
        // 遍历formData得到内容，封装map集合
        Map<String, Object> map = new HashMap<>();
        for (Map.Entry<String, Object> entry : formData.entrySet()) {
            map.put(entry.getKey(), entry.getValue());
        }
        Map<String, Object> variables = new HashMap<>();
        variables.put("data", map);
        // 启动流程实例
        ProcessInstance processInstance =
                runtimeService.startProcessInstanceByKey(processDefinitionKey, businessKey, variables);
        // 5 查询下一个审批人
        // 审批人可能多个
        List<Task> taskList = this.getCurrentTaskList(processInstance.getId());
        List<String> nameList = new ArrayList<>();
        for (Task task : taskList) {
            String assigneeName = task.getAssignee();
            SysUser user = sysUserService.getByUsername(assigneeName);
            String name = user.getName();
            nameList.add(name);
            // TODO 6 推送消息
            messageService.pushPendingMessage(process.getId(), user.getId(), task.getId());
        }
        process.setProcessInstanceId(processInstance.getId());
        process.setDescription("等待" + StringUtils.join(nameList.toArray(), ",") + "审批");
        // 7 业务和流程关联 更新oa_process
        baseMapper.updateById(process);
        // 记录操作审批信息记录
        processRecordService.record(process.getId(), 1, "发起申请");
    }

    @Override
    public IPage<ProcessVo> findPending(Page<Process> pageParam) {
        // 1 封装查询条件，根据当前用户名称查询待办任务
        TaskQuery taskQuery = taskService.createTaskQuery()
                .taskAssignee(LoginUserInfoHelper.getUsername())
                .orderByTaskCreateTime().desc();
        // 2 调用方法分页查询，返回list集合，待办任务集合
        // listPage方法有两个参数
        // 第一个参数：开始位置  第二个参数：每页显示记录数
        int begin = (int) ((pageParam.getCurrent() - 1) * pageParam.getSize());
        int size = (int) pageParam.getSize();
        List<Task> taskList = taskQuery.listPage(begin, size);
        long totalCount = taskQuery.count();
        // 3 封装返回list集合数据 到List<ProcessVo>中
        // List<Task> --> List<ProcessVo>
        List<ProcessVo> processVoList = new ArrayList<>();
        for (Task task : taskList) {
            // 从task获取流程实例Id
            String processInstanceId = task.getProcessInstanceId();
            // 根据流程实例Id获取实例对象
            ProcessInstance processInstance =
                    runtimeService.createProcessInstanceQuery()
                            .processInstanceId(processInstanceId).singleResult();
            // 从流程历史对象获取业务 key --> 就是processId
            String businessKey = processInstance.getBusinessKey();
            if (businessKey == null) {
                continue;
            }
            // 根据业务key获取Process对象
            long processId = Long.parseLong(businessKey);
            Process process = baseMapper.selectById(processId);
            // Process对象 复制到 ProcessVo对象
            // 这里是个大坑，必须加判断
            if (process == null) {
                continue;
            }
            ProcessVo processVo = new ProcessVo();
            BeanUtils.copyProperties(process, processVo);
            processVo.setTaskId(task.getId());
            // 放到最终list集合processVoList
            processVoList.add(processVo);
        }
        // 4 封装返回IPage 对象
        IPage<ProcessVo> page = new Page<>(pageParam.getCurrent(), pageParam.getSize(), totalCount);
        page.setRecords(processVoList);
        return page;
    }

    @Override
    public Map<String, Object> show(Long id) {
        // 1 根据流程id获取流程信息Process
        Process process = baseMapper.selectById(id);
        // 2 根据流程id获取流程记录信息
        LambdaQueryWrapper<ProcessRecord> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ProcessRecord::getProcessId, id);
        List<ProcessRecord> processRecordList = processRecordService.list(wrapper);
        // 3 根据模板id查询模板消息
        ProcessTemplate processTemplate = processTemplateService.getById(process.getProcessTemplateId());
        // 4 判断当前用户是否可以审批
        // 可以看到信息的人不一定能审批，且不能重复审批。
        boolean isApprove = false;
        List<Task> taskList = this.getCurrentTaskList(process.getProcessInstanceId());
        for (Task task : taskList) {
            // 判断任务审批人是否当前用户
            String username = LoginUserInfoHelper.getUsername();
            if (task.getAssignee().equals(username)) {
                isApprove = true;
            }
        }
        // 5 查询数据封装到map返回
        Map<String, Object> map = new HashMap<>();
        map.put("process", process);
        map.put("processRecordList", processRecordList);
        map.put("processTemplate", processTemplate);
        map.put("isApprove", isApprove);
        return map;
    }

    @Override
    public void approve(ApprovalVo approvalVo) {
        // 1 从approvalVo获取任务id，根据任务id获取流程变量
        String taskId = approvalVo.getTaskId();
        Map<String, Object> variables = taskService.getVariables(taskId);
        for (Map.Entry<String, Object> entry : variables.entrySet()) {
            log.info("{}", entry.getKey());
            log.info("{}", entry.getValue());
        }
        // 2 判断审批状态值
        if (approvalVo.getStatus() == 1) {
            // 2.1、 状态值 = 1 审批通过
            Map<String, Object> variable = taskService.getVariables(taskId);
            taskService.complete(taskId, variable);
        } else {
            // 2.2、状态值 = -1 驳回，流程结束
            this.endTask(taskId);
        }
        // 3 记录审批相关过程信息 oa_process_record
        String description = approvalVo.getStatus() == 1 ? "通过" : "驳回";
        processRecordService
                .record(approvalVo.getProcessId(), approvalVo.getStatus(), description);
        // 4 查询下一个审批人，更新流程表记录 process
        Process process = baseMapper.selectById(approvalVo.getProcessId());
        // 查询任务
        List<Task> taskList = this.getCurrentTaskList(process.getProcessInstanceId());
        if (!CollectionUtils.isEmpty(taskList)) {
            List<String> assignList = new ArrayList<>();
            for (Task task : taskList) {
                String assignee = task.getAssignee();
                SysUser sysUser = sysUserService.getByUsername(assignee);
                assignList.add(sysUser.getName());
                // TODO 公众号消息推送

            }
            // 更新process流程消息
            process.setDescription("等待" + StringUtils.join(assignList.toArray(), ",") + "审批");
            process.setStatus(1);
        } else {
            if (approvalVo.getStatus().intValue() == 1) {
                process.setDescription("审批完成（通过）");
                process.setStatus(2);
            } else {
                process.setDescription("审批完成（驳回）");
                process.setStatus(-1);
            }
        }
        baseMapper.updateById(process);
    }

    // 已处理
    @Override
    public IPage<ProcessVo> findProcessed(Page<Process> pageParam) {
        // 封装查询条件
        HistoricTaskInstanceQuery query =
                historyService.createHistoricTaskInstanceQuery()
                        .taskAssignee(LoginUserInfoHelper.getUsername())
                        .finished().orderByTaskCreateTime().desc();
        // 调用方法条件分页查询，返回list集合
        int begin = (int) ((pageParam.getCurrent() - 1) * pageParam.getSize());
        int size = (int) pageParam.getSize();
        List<HistoricTaskInstance> list = query.listPage(begin, size);
        long totalCount = query.count();
        // 遍历返回list集合，封装List<ProcessVo>
        List<ProcessVo> processVoList = new ArrayList<>();
        for (HistoricTaskInstance item : list) {
            // 流程实例id
            String processInstanceId = item.getProcessInstanceId();
            // 根据流程实例id查询获取process信息
            LambdaQueryWrapper<Process> wrapper = new LambdaQueryWrapper<>();
            wrapper.eq(Process::getProcessInstanceId, processInstanceId);
            Process process = baseMapper.selectOne(wrapper);
            if (process == null) {
                continue;
            }
            // process转换为processVo
            ProcessVo processVo = new ProcessVo();
            BeanUtils.copyProperties(process, processVo);
            // 放到list
            processVoList.add(processVo);
        }
        // IPage封装分页查询所有数据，返回
        IPage<ProcessVo> pageModel = new Page<>(pageParam.getCurrent(), pageParam.getSize(), totalCount);
        pageModel.setRecords(processVoList);
        return pageModel;
    }

    // 已发起
    @Override
    public IPage<ProcessVo> findStarted(Page<ProcessVo> pageParam) {
        ProcessQueryVo processQueryVo = new ProcessQueryVo();
        processQueryVo.setUserId(LoginUserInfoHelper.getUserId());
        IPage<ProcessVo> processVoIPage = baseMapper.selectPage(pageParam, processQueryVo);
        return processVoIPage;
    }

    // 结束流程
    private void endTask(String taskId) {
        // 1 根据任务id获取任务对象 Task
        Task task = taskService.createTaskQuery().taskId(taskId).singleResult();
        // 2 获取流程定义模型 BpmnModel
        BpmnModel bpmnModel = repositoryService.getBpmnModel(task.getProcessDefinitionId());
        // 3 获取结束流向节点
        List<EndEvent> endEventList = bpmnModel.getMainProcess().findFlowElementsOfType(EndEvent.class);
        if (CollectionUtils.isEmpty(endEventList)) {
            return;
        }
        FlowNode endFlowNode = (FlowNode) endEventList.get(0);
        // 4 当前流向节点
        FlowNode currentFlowNode = (FlowNode) bpmnModel
                .getMainProcess().getFlowElement(task.getTaskDefinitionKey());
        //临时保存当前活动的原生方向
        List originalSequenceFlowList = new ArrayList<>();
        originalSequenceFlowList.addAll(currentFlowNode.getOutgoingFlows());
        // 5 清理当前流动方向
        currentFlowNode.getOutgoingFlows().clear();
        // 6 创建新流向
        SequenceFlow newSequenceFlow = new SequenceFlow();
        newSequenceFlow.setId("newSequenceFlow");
        newSequenceFlow.setSourceFlowElement(currentFlowNode);
        newSequenceFlow.setTargetFlowElement(endFlowNode);
        // 7 当前节点指向新方向
        List newSequenceFlowList = new ArrayList<>();
        newSequenceFlowList.add(newSequenceFlow);
        currentFlowNode.setOutgoingFlows(newSequenceFlowList);
        // 8 完成当前任务
        taskService.complete(taskId);
    }

    // 当前任务的列表
    private List<Task> getCurrentTaskList(String id) {
        List<Task> taskList =
                taskService.createTaskQuery().processInstanceId(id).list();
        return taskList;
    }
}






